Improvement in processes for tanning hides or skins



UNI ED STATES PATENT OFFICE.

CHARLES RICHTER, OF DETROIT, MICHIGAN, ASSIGNOR TO NATIONAL LEATHER COMPANY, OF SAME PLACE.

IMPROVEMENT IN PROCESSES FOR TANNING HIDES OR SKINS.

Specification forming part of Letters Patent No. 178.468, dated June 6, 1876 application filed May 4, 1876. i

To all whom it may concern:

Be it known that I, CHARLES RICHTER, of Detroit, in the county of Wayne and State of Michigan, have invented an Improvement in Processes for Tanning Hides and Skins, of which the following is a specification:

My invention relates to an improvement in the quick processes for tanning hides without the use of bark, and is more especially designed as an improvement on the process for which Letters Patent N 0. 162,140 were issued to George A. Bartenbach and myself on April hour in the above-described tan-liquor, during which time they should be wheeled, handled, or otherwise stirred up in the liquor, so as to expose every pore to the action of the liquor, after which the leather can be hung up to dry.

Whip-leather requires to be stretched after drying.

Lace-leather requires to be stuffed with a mixture of raccoon-oil and glycerine.

Shoe-leather may be tanned with the hair on, and robes with their fur, in which case their skin sides should be rubbed with the following mixture: Water, one gallon; sal-soda, two ounces; raccoon-oil, one quart; glycer- 1ne, six ounces.

In tanning calf-skins, uppers, and harnessleather, to give them the natural color, soak them in hemlock or oak tan-liquor long enough to give them the color on the surface, after which they may be tanned by soaking them one day in my above described tau liquor, during which time they should be handled at least three times.

Leather so made will have much more elasticity, toughness, and pliability than leather tanned with bark alone, at a fraction of its cost.

Any pure and clear animal oil may be used in lieu of the raccoon-oil.

What I claim as my invention is- 1. In the process of tanning hides or skins, the tan-liquor, consisting of water, sulphuric acid, common salt, Wheat iniddlings, and so.- gar of lead, in about the proportions described.

2. In the process of tanninghides or skins, the stuffing compound, consisting of clear pure animal oil and glycerine, substantially as described.

3. 1n the process of tanning hides or skins, the solution consisting of water, sal-soda, animal oil, and glycerine, when applied to skin sides of hides tanned with the hair on, in about the proportions described.

4. In the manufacture of leather from hides or skins, the application of the tanning solution named, followed by the use of the stuffing compound, composed of the ingredients stated, in about the proportions set forth.

CHARLES RICHTER. Witnesses:

H. F. EBERTs, H. S. SPRAGUE. 

